Heat exchange element



July .2?, 1937. o. STEINBERG-ET AL f 2,688,391

HEAT EXCHANGE ELEMENT Filed Feb. 18, 1936 l2 sheets-sheet 1 g-MS MS July 27, 1937.

o. STEINBERG 'x-:r A1. HEAT EXCHANGE ELM/namI Filed Feb; 18, 1936 2 Sheets-Sheet 2 l l .l

5 y M AZ'Z'orr/e] Patented July 2,7, 1937 uruTED STATE 2,088,391 HEAT EXCHANGE ELEMENT Otto Steinberg, Emmendingen,

ard Wenzl, Freiburg, LI'Br.,

18,' 1936, Serial February 21, 19

Application February In Germany Baden, and Rich- Germany 7 claims. (ci. 251-256) This invention relates to a heat-ex hange aD- paratus in the form of a at.pocke which is adapted to resist internal pressure and is designed for example, although not exclusively, for use in cooling systems in which the cooling agent produced by the evaporation of suitableliquids circulates in' the interior of the nat-pocket exchanger andexerts its cooling action through the medium of the flat walls of the exchanger on the agent owing about the outer faces of these walls.

It is an object of the present invention to ensure that the iiat walls of the exchanger are relatively anchored to a sufficient extent to resist the internal pressure occurring, without the necessity for boring or perforating the said walls.

A further object is to provide a heat-exchange element of the character described, which possesses an equal strength throughout. v

A still further object is to -provide a heat-exchange element aforesaid, which is light in weight, compact in form and economical. in use.

In the accomplishment of these and other ob# jects and advantages which will become apparent as the description proceeds the two walls of the heat-exchange element, which are welded together at their edges, are furnished on their inner faces with blocks or abutments the bases of which are welded to. the walls and which engage with each other in pairs. l l

In this way it is` .accomplished that the two welding seams vof each block or abutment are subjected to an even strain. The free space in the interior of the exchanger is,not unduly restricted, inasmuch as the blocks or abutments themselves are not subjected to any appreciable bending strain and accordingly do not call for a reinforced cross-section.

The invention will now be described more fully with reference to the accompanying drawings, 'in which l v Fig, 1 is a sectional view of an embodiment of the apparatus, taken along the line I-I of Fig. 2,

Fig. 2 is a section taken on the line 2-2 of Fig. 1,

Fig. 3 is a sectional view taken along the line 3-3 of Figsfl and 2.

Fig. 4A is a fragmental portion of Fig. 3 ,showing on enlarged scale the arrangement of the blocks,

Fig. 5 is a view likewise on enlarged scale of a fragment of Fig. 1, and 7" Fig. Gis an enlarged fragment of Fig. 2.

Figs. I to 9 illustrate a modified form of embodiment .of the heat-exchange element withI direct engagement of the blocks or abutments..

Figs. and 1l illustrate an example of the use of a special locking member.

The iiatpocket exchanger shown in Figs. 1 to 'compri'ses two smooth parallel'walls I and '2,

whichare'composed of sheet metal andare drawn at 3. These wallsl are inwards at the edges as welded together about the, periphery. The sockets for the supply and discharge ofthe cooling agent are designated 4 and 5. Separate anchoring abutments 6 and 1 are welded to the inner faces of the walls I and 2 in vertical rbws, these abutments engaging with each other along inclined surfaces, as shown in detail in Figs. 4 to 6. The blocks orabutments 6, which are approximately rhombic in cross-section, are welded to the sheet l invsuitable spacial disposal to each other, and similar blocks or abutments 1 situated in the gaps between the abutments 6 are welded to the sheet or wall 2. 'Ihe faces 8 of the abutments 6 and the faces 9 of the abutments l, i. e., the oppositely disposed faces of thel two sets of blocks, are caused to bear against each other when the walls are iitted together. Any internal pressure within'the exchange element acting vertically against the two walls is then taken over equally by the two sets of locks through the medium of their inclined face 8 and 9 and accordingly distributed over the entire sur-v face of the walls. In the case of internal pressure in the exchange element the rhombic abutments take up over through the medium o; the inclined faces 8 and 9 theforces which-aredirectedvertically against the walls, in this way ensuring tion oi the forces.

' The assembly of the exchange element may conveniently be performedin such fashion that the entire surface of the wallv 'an even distribu- A the twofwalls furnished with'the abutments are first placed loosely one against the other with the blocks on the one wall disposed between the blocks on the voppsite wall, whereupon the desired spacial disposal of the two walls may be regulated by the degree of pressure exerted in the direction of the arrows I0. Whilst the are thus held in position the peripheral edges 3 are welded together, so that after releasepf the pressure the welding seams-take over the strains directed parallel to the walls and emanating from the wedge surfaces. l

In place of the arrangement of the blocks as shown in Fig. 2 these blocks may also be staggered 'in relationto one another in adjacent rows of each wall, so that the blocks in any one row will then be opposite to the gaps between the blocks walls l passed through the same in U-shaped members 22 and 23, which are disposed end to end in the assembled position of the exchanger, are welded at their open sides to the two walls I and 2, rods or bolts 24 then being order that internal pressures may notviorce the walls apart.

What we claim as new and desire to secure by Letters Patent is:

1. A heat-exchange device comprising twoouter walls welded together about their periphery to form a at container, and single abutments distributed over and welded to the inner faces of each of the said walls, the abutments on either wall each'engaging underneath an abutment on the opposite wall for the purpose of anchoring the said walls in relation to one another against internal pressure within said container.

2. A heat-exchange device comprising two outer walls Welded together about their periphery to form a iiat container, and single abutments distributed over and welded to the inner faces of each of the said walls, the abutments on either wall each engaging underneath an abutment on the opposite wall and the welding seams of each pair of cooperating abutments being disposed parallel to the direction of engagement of the said abutments.

3. A heat-exchange device comprising two outer walls welded together about their periphery to form a flat container, and single abutments distributed over and welded alternately to the inner faces of each of said walls to form straight` rows of abutments on either wall, each abutment onthe one wall engaging underneath a corresponding abutment on the opposite wall for the purpose of anchoring the said Walls in relation to one another against internal pressure within said container. Y

4. A heat-exchange device comprising two outer walls welded together about their periphery to form a iiat container, andsingle abutments distributed over and welded alternately to the inner faces of each of said walls to form straight rows of abutments, the abutments in the single rows on each Wall being staggered in relation to the abutments in adjacent rows, and the abutments on the one wall engaging underneath the abutments on the opposite wall for the purpose of anchoring the said walls in relation to one another against internal pressure'within said container.

5. A heat-exchange, device comprising two outer walls welded together about their periphery to' form a flat container, single U-shaped abutmentswelded to one wall, and single pawl-like abutments welded to the opposite wall and engaging 'with the said U-shaped abutments for the purpose of anchoring the said walls in relation to each other against container.

- 6. A heat-exchange device comprising, two outer walls welded together about their periphery to form a flat container, and substantially rhombic abutments Welded to the inner faces of the said walls and interengaging with their over-Y lapping faces for the purpose of anchoring the said walls in relation to each other against internal pressure within said container.

7. A heat-exchange device comprising two outer walls welded together about their periphery to form a at container, and U-shaped abutments placed end to end in rows between the walls, the open ends of alternate abutments being welded to one wall and the open ends of the other abutments being welded to the other wall, and bolts passed through the abutments for the purpose of anchoring the said walls in relation to one another against internal pressure within said container. f

O'IIO STEINBERG. RICHARD WENZL.

internal pressure within said 

